[gnugo-devel] Tripod group

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[gnugo-devel] Tripod group

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Sat, 7 Dec 2002 14:40:29 -0800

I'm wondering if ld_owl:151 is correct.
Here's the position.
+-----------
|..*........
|...X.......
|.XXOOOOO...
|..OO.......
|..O........
|..O........
|..O........
Surprising, but it seems to me that an attack by O at C19
can produce at least a ko.
I have in front of me a volume of Tsume Go problems by Cho
Chikun (Chinese edition, I think) who considers a very
similar position on p.98 and does not consider the move at
C19. However I cannot find a refutation better than
ko. For a while I thought that pushing along the side at
E18 worked, but GNU came up with B19 leading to this position:
+-----------
|.OO........
|...XX......
|.XXOOOOO...
|..OO.......
|..O........
|..O........
|..O........
I can't find anything better than ko for black.
Am I missing something?
Dan